<template>
  <div class="upload-file">
    <el-button size="mini" type="primary"  @click="dialogVisible = true">{{buttonName}}<i class="el-icon-upload el-icon--right"></i></el-button>
    <!-- 上传提示 -->
    <div class="el-upload__tip" slot="tip" v-if="showTip">
      请上传
      <template v-if="fileSize"> 大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b> </template>
      <template v-if="fileType"> 格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b> </template>
      的文件
    </div>
    <!--&lt;!&ndash; 文件列表 &ndash;&gt;-->
    <!--<transition-group class="upload-file-list el-upload-list el-upload-list&#45;&#45;text" name="el-fade-in-linear" tag="ul">-->
      <!--<li :key="file.uid" class="el-upload-list__item ele-upload-list__item-content" v-for="(file, index) in fileList">-->
        <!--<el-link :href="`${baseUrl}${file.url}`" :underline="false" target="_blank">-->
          <!--<span class="el-icon-document"> {{ getFileName(file.name) }} </span>-->
        <!--</el-link>-->
        <!--<div class="ele-upload-list__item-content-action">-->
          <!--<el-link :underline="false" @click="handleDelete(index)" type="danger">删除</el-link>-->
        <!--</div>-->
      <!--</li>-->
    <!--</transition-group>-->
    <!--action 必选参数，上传的地址-->
    <el-dialog
      title="文件上传"
      :visible.sync="dialogVisible"
      width="35%"
      :before-close="closeDailog"
      append-to-body
      v-dialogDrag>
      <!--上传文件步骤条-->
      <el-steps :active="fileUploadStepActive" finish-status="success">
        <el-step title="1:选择文件"></el-step>
        <el-step title="2:上传到服务器" icon="el-icon-upload"></el-step>
        <el-step title="3:完成" ></el-step>
      </el-steps>
      <div style="height: 15px;"></div>
      <!--文件上传-->
        <el-upload
          ref="upload"
          :action="uploadFileUrl"
          :data="uploadDataPara"
          :before-upload="handleBeforeUpload"
          :file-list="fileList"
          :limit="limit"
          :on-error="handleUploadError"
          :on-exceed="handleExceed"
          :on-success="handleUploadSuccess"
          :show-file-list="true"
          :headers="headers"
          :auto-upload="false"
          :on-preview="handlePreview"
          :on-remove="handleRemove"
          :before-remove="beforeRemove"
          class="upload-file-uploader"
        >
          <!-- 上传按钮 -->
          <el-button slot="trigger"  type="primary" @click="selectFile">选择文件</el-button>
          <el-button  type="success" @click="submitUpload" style="margin-left: 10px;">上传到本地服务器</el-button>
        </el-upload>
        <span slot="footer" class="dialog-footer">
          <el-button type="danger" @click="cancleUpload">取消文件上传</el-button>
          <el-button type="primary" @click="closeDailog">关闭对话框</el-button>
        </span>
    </el-dialog>
  </div>
</template>

<script>
  import { getToken } from "@/utils/auth";
  import Cookies from 'js-cookie'

  export default {
    name: "FileUpload",
    props: {
      userId: {
        type: Number
      },
      contractId: {
        type: Number,
      },
      // 值
      value: [String, Object, Array],
      // 数量限制
      limit: {
        type: Number,
        default: 5,
      },
      // 大小限制(MB)
      fileSize: {
        type: Number,
        default: 10,
      },
      // 文件类型
      fileType: {
        type: Array,
        default: () => ["doc", "txt", "pdf"],
      },
      // 是否显示提示
      isShowTip: {
        type: Boolean,
        default: true
      },
      buttonName:{
        type:String,
        default:'合同上传'
      },
      attachmentId:{
        type:Number,
        default: -1
      }
    },
    data() {
      return {
        baseUrl: process.env.VUE_APP_BASE_API,
        uploadFileUrl: process.env.VUE_APP_BASE_API + "/system/attachment/upload", // 上传的图片服务器地址
        headers: {
          Authorization: "Bearer " + getToken(),
        },
        fileList: [],
        dialogVisible:false,
        // 上传文件附带的参数
        uploadDataPara:{
          fileName:"",
          fileType:"",
          fileSize:"",
          contractId:"",
          userId:'',
          userName:'',
          id:''
        },
        // 上传文件步骤条
        fileUploadStepActive:0,
        // 用户是否已经点击了上传文件
        selectFileName:''
      };
    },
    watch: {
      value: {
        handler(val) {
          if (val) {
            let temp = 1;
            // 首先将值转为数组
            const list = Array.isArray(val) ? val : this.value.split(',');
            // 然后将数组转为对象数组
            this.fileList = list.map(item => {
              if (typeof item === "string") {
                item = { name: item, url: item };
              }
              item.uid = item.uid || new Date().getTime() + temp++;
              return item;
            });
          } else {
            this.fileList = [];
            return [];
          }
        },
        deep: true,
        immediate: true
      }
    },
    computed: {
      // 是否显示提示
      showTip() {
        return this.isShowTip && (this.fileType || this.fileSize);
      },
    },
    created() {
      //console.log("this",this.uploadFileUrl)
      // console.log("this",this.contractId)
      // console.log("this.userId",this.userId)
    },
    methods: {
      // 上传前校检格式和大小
      handleBeforeUpload(file) {
        //获取文件名称、文件大小、文件类型
        // 获取文件后缀
        let fileTypeTem =  file.name.substring(file.name.lastIndexOf('.')+1)
        let fileNameTem  = file.name
        let fileSizeTem  = file.size

        this.selectFileName = file.name

        // 将文件信息赋值给 uploadDataPara
        this.uploadDataPara.fileType = fileTypeTem
        this.uploadDataPara.fileName = fileNameTem
        this.uploadDataPara.fileSize = fileSizeTem
        this.uploadDataPara.userId = this.userId//上传信息中保存文件所属用户
        this.uploadDataPara.contractId = this.contractId
        this.uploadDataPara.id = this.attachmentId
        this.uploadDataPara.userName = Cookies.get("ReturnuserName")
        console.log(this.uploadDataPara)
        // 校检文件类型
        if (this.fileType) {
          let fileExtension = "";
          if (file.name.lastIndexOf(".") > -1) {
            fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
          }
          const isTypeOk = this.fileType.some((type) => {
            if (file.type.indexOf(type) > -1) return true;
            if (fileExtension && fileExtension.indexOf(type) > -1) return true;
            return false;
          });
          if (!isTypeOk) {
            this.$message.error(`文件格式不正确, 请上传${this.fileType.join("/")}格式文件!`);
            return false;
          }
        }
        // 校检文件大小
        if (this.fileSize) {
          const isLt = file.size / 1024 / 1024 < this.fileSize;
          if (!isLt) {
            this.$message.error(`上传文件大小不能超过 ${this.fileSize} MB!`);
            //  超过指定文件大小之后须将进度条置为0
            this.fileUploadStepActive = 0;
            return false;
          }
        }
        return true;
      },
      // 文件个数超出
      handleExceed() {
        this.$message.error(`上传文件数量不能超过 ${this.limit} 个!`);
      },
      // 上传失败
      handleUploadError(err) {
        this.$message.error("上传失败, 请重试");
      },
      // 上传成功回调
      handleUploadSuccess(res, file) {
        console.log("res",res)
        if (res.code == 200) {
          this.$message.success("上传成功");
          this.fileUploadStepActive = 3;
          this.fileList.push({ name: res.fileName, url: res.fileName });
          this.$emit("input", this.listToString(this.fileList));
        }
      },
      // 删除文件
      handleDelete(index) {
        this.fileList.splice(index, 1);
        this.$emit("input", this.listToString(this.fileList));
      },
      // 获取文件名称
      getFileName(name) {
        if (name.lastIndexOf("/") > -1) {
          return name.slice(name.lastIndexOf("/") + 1).toLowerCase();
        } else {
          return "";
        }
      },
      // 对象转成指定字符串分隔
      listToString(list, separator) {
        let strs = "";
        separator = separator || ",";
        for (let i in list) {
          strs += list[i].url + separator;
        }
        return strs != '' ? strs.substr(0, strs.length - 1) : '';
      },
      selectFile(){
        //步骤条进度更新
          this.fileUploadStepActive = 1
      },
      // 单击上传到服务器,开始文件上传
      submitUpload() {
        //手动上传文件
        this.$refs.upload.submit();
        if (this.selectFileName == ''){
          this.$message.error("请先选取需要上传的文件");
        }
        else{
          //步骤条更新
            this.fileUploadStepActive = 2;
        }
      },
      // 取消文件上传
      cancleUpload(){
        this.$refs.upload.abort();
        // 清空此次文件上传列表
        this.$refs.upload.clearFiles();
        //关闭对话框
        this.dialogVisible = false
        // 初始化步骤条
        this.fileUploadStepActive = 0;
      },
      // 文件上传后,单击确定关闭对话框,更新文件列表页面,
      closeDailog(){
        // 清空此次文件上传列表
        this.$refs.upload.clearFiles();
        //关闭对话框
        this.dialogVisible = false
        // 初始化步骤条
        this.fileUploadStepActive = 0;
        this.$emit("close");
      },
      handleRemove(file, fileList) {
        console.log(file, fileList);
      },
      handlePreview(file) {
        console.log(file);
      },
      beforeRemove(file, fileList) {
        return this.$confirm(`确定移除 ${ file.name }？`);
      }
      // uploadFunc(){
      //   // let fd = new FormData();
      //   // fd.append('userId',this.userId);
      //   // fd.append('contractId',this.contractId);
      //   axios.post(this.uploadFileUrl,{
      //     userId:this.userId,
      //     contractId:this.contractId,
      //   },).then(res=>{
      //     console.log(res)
      //   })
      // }
    }
  };
</script>

<style scoped lang="scss">
  .upload-file-uploader {
    margin-bottom: 5px;
  }
  .upload-file-list .el-upload-list__item {
    border: 1px solid #e4e7ed;
    line-height: 2;
    margin-bottom: 10px;
    position: relative;
  }
  .upload-file-list .ele-upload-list__item-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: inherit;
  }
  .ele-upload-list__item-content-action .el-link {
    margin-right: 10px;
  }
</style>
